Thomas bachb salter and john hughes



(MOdeL) T. B. SALTER & J. HUGHES.

SPRING SCALE.

NO. 390,522. Patented Oct. 2, 1888.

Wiwi m i i I i R.

WI mE'j E UNiTED STATES PATENT ()FFICE.

THOMAS BACHE SALTER AND JOHN HUGHES, OF WEST BROMWIGH, COUNTY OFSTAFFORD, ENGLAND.

SPRiNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 390,522, dated Getober2, 1888.

Application filed March 22,1884. Serial No. 125.166. (Modeh) Patented inEngland January 5, 1894, No. 800; in Austria- Hungary Janunrylfi, 1884.No. 2,501 and No. 38,989; in France January 15, 1884, No.159,737,an1l inCanada April 22, 1884,

To all whom it may concern.-

Be it known that we, THOMAS Brena SALTER and JOHN HUGHES, both of thetown of lVest Bromwich, in the county of Stafford, England, haveinvented certain new and useful Improvements in the Manufacture ofSpring-Balances, (for which patents have been granted us in thefollowing countries, viz: in England, dated January 5, 1884, No. 800; inFrance, January 15, 1884:, No. 159,737; in Austria-Hungary, January 12,1884., Nos. 2,591 and 38,989, and in Canada, April 22, 1884, No.20,397,) of which the following is a specifica tion.

7 This invention relates to improvements, as hereinafter described andclaimed, in springbalances.

In the accompanying drawings, Figure l is a perspective view of thespring-balance with the dial-plate removed in order to better illustratethe position and construction of the parts. Fig. 2 is a front elevationof the balance with parts of the dial-plate removed. Fig. 3 is a sideelevation representing the spring and its connection with the loops andtongue. Fig. 3 represents the details of the parts of the upper andlower loops. Fig. 4.- represents the blank for forming the case; Fig. 4,an edge or top View of the sameafter the first operation of forming thecase; Fig. 4:", a top View with the parts a of the blank bent down intoposition. Fig. 5 represents a front elevation of the tongue and pointermade from one piece of metal. Fig. 6 represents a vertical section ofpart of the case, showing the manner of fastening the case to thesuspending-loop.

(2 represents the case, which is formed out of a single piece of sheetmetal, which is first stamped out, as shown in Fig. 4, in flat form,with central and side lips, a, at its upper end. This blank is then byany suitable means bent into semicircular form, as shown in Figs. 4 and4, with the central lip, a, turned horizontally inward to cover the reartop end of the case, and with the side wings, a, turned inward in ahorizontal direction and transversely vertical side wings or flanges, 1,being formed by turning the sides of the blank outward, and to which thedialplate is attached. \Vithin this semicircular case so formed thespiral weighing-spring bis contained,asshown in Fig. l.

0 represents the balance-suspending loop, which has an eyed lower end,within which the upper end of the spiral spring I) is engaged, and'aneyed upper end, within which the suspensionring 2 is contained, a slotbeing formed about midway in the rear edge of the loop 0 to permit saidloops extending across and resting upon the upper face of the centralbent-down wing, a.

0 represents a cross-piece or key, which is placed against the underfaces of the wings a, constituting the top of the case. When suchcross-piece has thus been placed in position, the loop 0 is placed inposition by forcing its slotted portion upon and in gripping contactwith the upper face of the central wing, a, and the under face of thecross-piece c. As will be observed on reference to Fig. 3, the crosspiece 0' has a central slotted portion, which permits the passage of theloop 0, and a rearward plane portion,against which the bottom edge ofthe slotted portion of the loop 0 may tip.

6 4 represents a hook or other suitable device, to which the article tobe weighed is attached or from which it is suspended.

0 represents a bottom loop, to which the hook 4 is attached. This loophas formed in its respective edges notches or recesses e" 6', within theupper pair of which the lower end of the coiled spring I) is inserted.The crosspiece c,or stop for limiting the upward movement of the loop 0and parts connected therewith, instead of being held in position bybrazing, as formerly, is formed with a central slot, 5, and side arms,6, and is inserted within the lowermost notches, e", the slot 5 being ofsuch length and width as to permit the plane portion of this cross-piecerearwardly of the slot to rest within the adjacent notch 0 and of theside arms, c gripping the side faces of the lower loop, a.

6 represents astud projecting from the front edge of the .loop 0, toreceive and constitute a pivot for the lever end of the tonguef. Thistongue is riveted in position upon the stud 6 in the usual manner. Thetonguef and pointer z are formed integrally in a single pieceof metal bystamping the upper end of the tongue in reduced form, somewhat after theshape of a T, and then bending such T portion over forwardly intohorizontal position.

d represents the dial-plate, which is removably held in position uponthe case by screws, or otherwise passed through suitable holes in itsface adjacent to its edges and corresponding holes formed in the sidewings or flanges, 1, of the case.

It will be observed that in our dial-plate the graduation-marks areadjacent to the slot therein, and the numerals and other indications areat the outer ends of such graduationmarks.

The case having been constructed and the case-snspendingloop and ringsecured thereto, as herein described, the lower loop, 0, spring I), stopor cross piece e, and tonguefare then connected together, as explained.The pointer z is then inserted sidewise within the slot in thedial-plate by being pushed through from the rear of the dial-plate, andthe pointer, spring, and parts connected therewith then brought to avertical position. The spring is then inserted within the case andattached at its upper end to the loop 0, and the dial-plate attached tothe side flanges, 1, of the case, which operation completes theassembling of the parts and results in the production of a completebalance.

It will be observed that the several parts of the balance are securelyconnected together without the aid of brazing, solder, or other similarmeans; that all of the several parts going to constitute the completebalance can be readily, easily, and cheaply formed, assembled, andconnected together, and that the balance is composed of the minimumnumber of parts necessary to secure an exact operative device.

\Vhat we claim is- 1. A spring -balance comprising a case formed of asingle piece of metal with outwardly-extending side flanges and at itsupper end with intu rned lips, a hanger-strip adapted to rest betweensaid lips,and having eyed ends extending, respectively, above the top ofand within the case, a key or securing-strip for clamping saidhangerstrip and case together, a suspending-ring engaging the eyed upperend of said hanger, a weighing-spring engaging at its upper end with theeyed lower end of said hanger, a notched plate, to which the lower endof said springis connected and having an eyed bottom end to receive asupport for the article to be weighed, an integrallyformed tongue andpointer secured at itslower end to said notched plate, and averticallyslotted graduated face -plate adapted, as described, to besecured to the side flanges of-the case, substantially as and for thepurpose set forth.

2. In a spring-balance,the con1bination,with an encircling case and aspiral spring, of a slotted loop adapted to receive the lower end ofsaid spring, a slotted cross-bar adapted to grip the slotted loop andserve as a stop for limiting the upward movement of the spring, and ahook or suspension device attached to the loop at the lower end of thespring, and a loop connected to the upper end of said spring, and havingan attaching cross-bar and a suspending loop or ring, substantially asset forth.

THOMAS BACHE SALTER. JOHN HUGHES.

WVitnesses:

GEORGE THoMAs OASHMORE, THOMAS SMITH.

